rootbrowseIAC-13D2session 44. Future Space Transportation SystemsPapers1. NELS - Launcher concept selection for the “New European Launch Service”2. Economical self-sustainability of a New European Launch Service (NELS)3. Conceptual design of a Space Tug for satellites missions support4. Design parameters optimisation of the unified series of reusable interorbital tug with electrical propulsions and nuclear power system of megawatt class in near earth transport operations for heavy payloads and sattelite transportation to f5. Progress of SpaceLiner Rocket-Powered High-Speed Concept6. Progress on the SKYLON and SABRE7. Analysis of Effectiveness of Utilization Strategy for Space Launch Vehicle with Reusable First Stage in Turnaround Servicing Phase8. The Conceptual Scheme Based on Air-breathing Propulsion Reusable Space Transportation System9. System-defined flight demonstrator of reentry launch vehicle’ block within reusable space launch vehicle configuration10. The Austral Launch Vehicle: Reducing Space Transportation Cost Through Reusability, Modularity and Simplicity11. Optimum Maneuver of Air Launch Rockets